How do etch-a-sketch’s work?

Question

How do etch-a-sketch’s work?

In: Technology

Answer 1

Contrary to popular belief, the stylus you use to draw doesn’t draw the line.

The inside “screen” of the toy is coated in aluminum powder, and when the stylus scrapes it out, it reveals the darkness inside the toy. When you shake it upside down, the beads inside the toy coat the screen, making it look “blank” again.

EDIT: Funny how you marked it technology.